Gas valves



oct. 14, 1958 Q LAMAR4 v 2,855,955

Gixs VALVES Filed Jan. 21, 1955 3 Sheets-Sheet l SMMER 'INVENTOR- .QZQQSa l .(FULL 0N) LOW E /N TE @MED/A TE TURA/DOWN ,FATE/ 5.7.0. PE2 Hoa@ou; 14, 195sl Filed Jan'. 21, 1955 sooo jaaa

c. C. LAMAR GAS VALVES 5 Sheecs-Sheei'l 2 agg;

c. 'ci LAMAR GAS VALVES 3 Sheets-Sheet 3 INVENTOR. Charles Clam?? 'LS/NHER ONLY lav/@WMM 1 v. l u

Filed Jan. 2 1, 1955 GAS VALVES Charles C. Lamar, Chicago, Ill.,assignor, by lmesue assignments, to Harper-Wyman Company, Chicago, El.,a corporation of Illinois Application January 21, 1955, Serial No.483,333

12 Claims. (Cl. IS7-599.2)

The present invention relates to gas valves and particularly toso-called double gas valves, i. e., valves used with gas burners eachhaving two burner sections and wherein the double valve controls theAsupply of gas to both sections. Burners of this type are called doubleburners and o-ne of the burner sections is generally called the mainburner and the other the simmer burner.

The present invention is an improvement over gas valves of the characterdisclosed and claimed in the copending applications of Charles C. Lamar,Serial No. 277,219, now Patent No. 2,770,253, granted November 13, 1956,Charles C. Lamar et al., Serial No. 449,042, and Charles C. Lamar etal., Serial No. 449,043. These applications disclose double gas valvesproviding a num ber of desirable operating characteristics and which canbe constructed simply and economically. The present invention isdirected particularly to a new and improved double valve havingadditional operative positions including one in which a predeterminedminimum quantity of gas is supplied tothe main burner section while gasis supplied also to the simmer burner section, and, furthermore, a valveproviding uniform turndown of the main burner section to the minimumvalue while supplying suicient gas to the simmer burner section toprovide sucient heat and desired heat distribution for certain cookingoperations and maintaining a minimum stable ame on both burner sections.

A further object of the present invention is to provide a double gasvalve having the advantages set forth above and also one providing auniform turndown of the simmer burner section with the main burnersection, which is accomplished, preferably, by interconnecting theoutlets, preferably through the valve plug, and simultaneouslydecreasing the flow of gas through both outlets by simultaneouslydecreasing the gas pressure at the interconnected outlets.

In the past, double gas valves have been operable into a plurality ofoperative positions from an olf position. Among these have been (l) afull on position in which the gas is supplied at a maximum rate to boththe main and simmer burner sections, (2) a full simmer only positionwherein gas is supplied at a maximum rate to the simmer burner sectiononly, and (3) a low simmer position wherein a predetermined smallquantity of gas is supplied to the simmer burner only. The valves alsoprovide what are called turndown ranges Where controllable or decreasingquantities of gas can be supplied to both burner sections or to thesimmer burner section only as the valve plug is turned tow-ard off fromthe full on or the full simmer position or increasing quantities whenthe valve plug is turned in the opposite direction from the simmer tothe full on position.

The gas valve of the present invention is provided with a furtheroperative position. This is one in which a predetermined minimumquantity of gas is supplied to the main burner and in which apredetermined minimum quantity of gas is at the same time supplied tothe States aten lrice simmer burner section. Furthermore, the turndownrange between the full on and full simmer postions is such that bothVthe main burner and the simmer burner sections are interconnected andthrottled at the same time thereby to provide a substantiallysimultaneous and uniform turndown of both sections. This is decidedlyadvantageous in certain cooking operations as in frying and the like,especially when thinewalled cooking vessels are used. With heaviercooking vessels this Tis not so important because of the heatdistribution afforded by the vessel itself. The valve of .the-presentinvention provides a .low fry position v'as vwell as a uniformlyregulatable frying range.

In brief, the valve of the present invention includes a valve bodyhaving a valve chamber which maybe tapered for the reception of arotatable tapered valve plug. The valve body is provided 'with a gasinlet passageway and a main burner outlet passageway including a radialportion which may be copla'n'ar with 'the inlet passageway but angularlyspaced from it. Both the inlet and outlet passageways communicate withthe chamber in the region of the plug. The valve body has also a rstoutlet passageway which may be considered to be a low simmer outletpassageway including an orice defining structure, either fixed orvariable, for predetermining the minimum tlow of gas to the simmerburner only in the socalled low simmer position. The valve body includesalso a full or primary simmer outlet passageway which is angularlyspaced from the inlet and main burner outlet passageways 'and may beaxially spaced from them. Finally, the valve body includes an auxiliarysimmer burner outlet passageway through which the simmer burner issupplied with gas in the so-called turndown range in which the flow ofgas to the main and simmer burners is regulatable. The valve plug has an-axial passageway which is preferably continuously in communication withthe low simmer outlet passage-l way. This communication can readily beprovided as by constructing `the axial passageway so that it opens intothe plug receiving chamber and by having the low simmer passageway incontinuous communication with the chamber and thus the open end of theaxial passage'- way in the valve plug. The Valve plug has also a firstpair of transverse or radial passageways extending from' the axialpassageway therein to the exterior of the valve plug and which areconstructed and arranged to be aligned with the inlet and main burneroutlet passageways in a full on position. The valve plug has a thirdpassageway which is coplanar With the primary simmer burner outletpassageway and aligned with the latter in the full on position. The plughas a fourth passageway coplanar with the third one but angularly spacedfrom it and disposed so as to be aligned with the primary simmer burneroutlet passageway in the full simmer position of the valve plug.

Further, and in accordance with the present invention, the valve bodyhas a pair yof auxiliary outlet passagewaysconnected to the main andsimmer burner outlet passageways.v These passageways are interconnectedpreferably through auxiliary passageways in the plug and supplied with aregulatable quantity of gas and are so arranged with respect topassageways in the valve plug that the same variable gas pressure isapplied to both the main and simmer burner outletpassageways duringoperation in the turndown 'range in which regulatable quantities of gasare supplied to both burner sections. This insures uniform turndown ofboth sections and in a simple and effective manner. The passageways alsoareconstructed and arranged so that .a predetermined minimum flow of gasis insured to the main burner section as well as to the simmer at theend of the turndown range to pro vide what may be called a low fryposition. The predetermined minimum flow to the simmer outlet passagewayonly is maintained in going from the low fry position into the fullsimmer position so as to avoid too low a turndown or a are-up of thesimmer burner section.

Other objects and advantages of the present invention will becomeapparent from the ensuing description of an illustrative embodimentthereof, in the course of which reference is had to the accompanyingdrawings, in which:

Fig. l is an enlarged partial cross sectional view of a valveconstructed in accordance with the present invention, the valve beingshown in its turndown range;

Fig. 2 is a transverse cross sectional view taken along the line 2 2 ofFig. 1, but illustrating the valve in its so-called full on or full mainand simmer position wherein full quantities of gas are supplied to boththe main and simmer burner sections;

Fig. 2a is a conical layout of the plug chamber and plug with the valvein its full on position;

Fig. 2b is a similar conical layout with the valve in theturndown-of-both range and before reaching the socalled low fryposition;

Figs. 3 and 3a are transverse cross sectional and conical layout views,respectively, of the valve at the low end of its turndown-of-both rangeand wherein a small quantity of gas is being supplied to both the mainand simmer burner sections;

Fig. 3b is a conical layout with the valve in the socalled low fryposition;

Figs. 4 and 4a are transverse cross sectional and conical layout views,respectively, of the valve in its full simmer only position;

Figs. 5 and 5a are transverse cross sectional and conical layout views,respectively, of the valve in its low simmer only position;

Figs. 6 and 6a are transverse cross sectional and conical layout views,respectively, of the valve in its olf position;

Figs. 7 and 8 are bottom plan views of the valve plug (with theauxiliary valve omitted) in the positions of Figs. 2 and 4,respectively; and

Fig. 9 is a ow diagram indicating approximately the gas flow in thevarious angular positions of the valve plug.

Referring now to the drawings and first to Figs. 1 and 2, the double gasvalve of the present invention is indicated as a whole by referencecharacter 30. It comprises a valve body 32 having a chamber 34 with aconical inner surface 36 within which `is mounted a movable controlmember 38 illustrated as a rotatable tapered or conical valve plug.

Gas is supplied to the valve from any suitable source such as a gasmanifold 40 shown only fragmentarily in Fig. 2. The valve body isprovided with a gas inlet passageway 1 formed in a downwardly extendingexternally threaded boss 42 utilized in securing the valve to themanifold. The body is also provided with generally radial outletpassageway portions 2 and 3 opening into chamber 34 and through whichgas is supplied to the main and simmer burners, respectively. Passageway2 communicates with an axially extending main burner outlet passagewayportion 44 formed in the valve body at one side of chamber 34 andterminating in an externally threaded boss 46 to which is secured anadjustable hood 48 which predetermines the maximum quantity of gassupplied to the main burner section of the double burner, not shown, inthe full on position of the valve in a manner well known to thoseskilled in the art. Hereafter, for the purpose of convenience, thepassageway 2 will generally be referred to as the main burner outletpassageway. The passageway 3, which will be considered to be the primarysimmer burner outlet passageway, communicates with a generally axiallyextending simmer outlet passageway portion 50 in the valve body vat theside opposite passageway 44 butin the same (horizontal) plane so thatthe inlet passageway 1 is substantially intermediate passageways 2 and3. The passageway S0, in turn, cornmunicates with a further simmeroutlet passageway 52 formed in an externally threaded boss 54 at the endof which is mounted an adjustable hood 56 which predetermines themaximum quantity of gas supplied to the simmer burner section (notshown) in both the full on and full simmer positions. All of thepassageways mentioned can readily be formed by drilling the valve body.The passageways 2 and 3 can be drilled from the outside of the valvebody after which the outer ends can readily be closed, as by the plugs58. These passageways and the inlet passageway 1 can also be drilled atthe same time as the hereinafter referred to passageways 11, 12 and 13in the valve plug.

The valve plug is provided with an axially extending passageway 10 andwith four transverse or radial passageways 11, 12, 13 and 14, of which,as best illustrated in Figs. 2 and 2a, the passageways 11, 12 and 13 arealigned with the passageways 1, 2 and 3 in the valve body in the full onposition of the valve plug. The passageways 1, 2, 11 and 12 may becoplanar. Passageways 3, 13 and 14 are coplanar and axially spaced fromat least the inlet passageway 1 so that there can be no registry thereofwith the inlet passageway. Also, passageway 14 registers with thepassageway 3 in the full simmer position in which position passageway 12in the plug may register with the inlet passageway 1 in the valve body,as will be described in greater detail herein after. In the specificvalve shown, passageways 1, 2, 11 and 12 are coplanar as are passageways3, 13 and 14. Passageways 1 and 11 have a diameter of .228 inch, 2 and12 a diameter of .1935 inch, 3 and 13 a diameter of .109 inch, and 14 adiameter of .093 inch. Passageways 2, 12 and 3 and 13, in the full mainand simmer position, are coplanar in a horizontal plane and passageways1 and 11 are in a vertical plane, i. e., at the bottom of the body andplug with their axes displaced .0135 inch to the left (as viewed in Fig.2) of the center line of the valve and axis of the valve plug. The plughas a length of 1%; inch, a taper of 2 inches per foot and a diameter of.361 inch at its smaller diameter end. Passageways 13 and 14 have theiraxes .242 inch from the smaller end of the plug and passageways 11 and12, 3/8 inch from the larger diameter end. Passageway 14 is in atransverse plane coplanar with passageway 13 and angularly it issomewhat more than from it.

The valve body includes also a low simmer outlet passageway 60, see Fig.1, through which a predetermined low quantity of gas is supplied to thesimmer burner section. The quantity of gas may be predetermined bysuitable means, such as the cup with a xed orice 62 mounted within thepassage. However, it should be understood that adjustable ow restrictingmeans may be utilized. The passageway 60 provides communication betweenthe plug receiving chamber 34 and the simmer burner outlet passageway52. The low simmer passageway thus may be seen effectively continuouslyto connect the simmer burner outlet passageway with the axial passageway10 in the valve plug.

The valve, further in accordance with the present invention, isconstructed and arranged in a novel manner to provide uniform turndownof the simmer section of the burner with the main section and by meansmaintaining the same regulated variable pressure in the simmer and mainburner outlet passageways'. This is accomplished by a construction inwhich the two outlet passageways are interconnected in the turndownrange so as to be supplied with gas at the same variable pressure asregulated by the valve plug. The construction includes an auxiliary mainburner passageway 5 leading from the outlet passageway 2 into the valvechamber at a point axially spaced toward the outer end of the valve fromthe inlet and outlet passageways in the body and the associatedpassageways 11 and 12 in the valve plug. It includes also an auxiliarysimmer burner outlet passageway 6 in the valve body connected by anaxially extending passageway 64 to the outlet passageway 50 leading tothe simmer burner. The outer end of passageway 6 may `be closed byanother plug 58. Associated with the auxiliary main and simmer burneroutlet passageways and 6' are transversely extending and interconnectedmain `and simmer auxiliary passageways 15 and 16 in the valve plug whichare so constructed and arranged that they both communicate with the bodyauxiliary outlet pas'sageways 5 and 6 in the turndown-of-both range ofthe valve plug. Passageway 15 has a diameter of .120 inch and 16 'adiameter of .093 inch and they are drilled at an angle and so locatedthat their axes, at the exterior of the plug, are located 111/64 inchtoward the larger diameter end of the plug from the center line ofpassageway 11. Passageway 5 has a diameter of .156 rinch and 6 adiameter of 1/s inch. Passageway 5 is drilled at an angle of 48 from thevertical and so that its right end, as viewed in Fig. 1, coincides withthe right end of passageway 15. Passageway 6 is drilled with its centerline displaced `.175 inch toward the larger diameter end of the plug'from the center line of passageway 11.

As indicated above, passageways 15 and 16 are interconnected in theturndown range and thus both outlet passageways are supplied with gas atthe same variable pressure in the turn-down-of-both range. Passageways15 and 16 are also connected to the axial passageway in the valve plugfor the supply of a minimum quantity of gas to the main section throughvalve 66. The valve 66 is an auxiliary valve which may be fixed oradjustable, as shown, and mounted `in a passageway or hollow 68 in thevalve stem 70 and including a tubular outer part 72 iixedly secured asby a press lit within the valve plug. Valve 66 includesl also arotatable part 74 having an enlarged outer end or head 76 provided witha screwdriver slot 78 whereby it can be rotated into desired angularposition. The rotatable part has an axial bore 80 at its inner endcommunicating with the axial passageway 10` in the plug. The outer andfixed valve member 72 is provided with an annular groove 82 in the planeof the plug passageways 15 and 16 and thus providing theabove mentionedinterconnection between them. This annular groove is connected to theaxial bore 80 by the transverse radial pass'ageways 84 and 86 in the xedand :rotatable parts of the auxiliary valve respectively, so that uponrotation of the inner member the registry of the parts can be adjustedto predetermine the minimum ilow of gas through valve 66 to the mainburner outlet passageway.

The interconnection of the main and simmer burner passageways in theturndown range through the auxiliary passageways 5, and 16 and theannular passageway results in the application of the same regulatedpressure to both the main and simmer outlet passageways, with the resultthat the flow through both to associated main and simmer burner sectionsis decreased at the same rate as determined by throttling of the iiow tothe main outlet passageway at the valve plug as passageways 2 and 12 goout of registry. The use of the orice cup 62 and auxiliary valve 66insure the supply of a predetermined minimum flow to each burner sectionto supply the flow requisite to the so-called low fry position. Eitheror both of the minimum flows may 'be of the fixed or variable type. Theminimum simmer ow may be about 450 B. t. u. per hour and the minimummain ilow may be about 2100 B. t. u. per hour. rlfhese values areillustrative and may be lowered as for example to about 1A of the fullsimmer flow and 1A of the main ow.

The various positions of the valve may be indicated to the user indesired manner by position indicating and determining means. The meansillustrated herein will not be described in detail but it is of acharacter disclosed and claimed inV a copending application of Philip S.Harper, Serial No. 544,484, tiled November 2, 1955, forming acontinuation of application Serial No, 162,446,

Cil

led 4M215 17, 19.50, now abandoned. The means includes' a full on andoii determining and indicating washer 92 having a radial projection (notshown) engageable with annularly spaced apart shoulders (not shown) onthe valve body in the oi and full on positions of the valve. The washerencircles and rotates with but is axially movable relative to the valvestem 70. It is biased against a housing 94 by a spring 96 which alsomaintains the valve plug seated. Additional intermediate positionindicating mechanism is located within the housing 94. The housingconsists of a cup-shaped element 98 and an end cap or plate 100 throughwhich the valve stem projects. The housing is held in assembled relationrelative to the valve body by the securing screws 102. Within thehousing is located a washer 104 also rotating with the valve stem and aspring element 106 cooperating with the washer for position indication.

As heretofore indicated, the valve is' operable into a plurality ofoperative positions from its olif position. These positions, indicatedparticularly in Figs. 2 to 6 and 2a to 6a; both inclusive, are a fullmain and simmer position, a turndown-of-both range, a low fry position,a full simmer only position, a low simmer only position and an offposition. In addition to the turndown of both the full main and simmer,the ow of gas to the simmer burner only can be regulated or turned down.Fig. 9 is a graph showing approximately the rate of llow of gas (in B.t. u. per hour) in the various angular positions of the valve plug andto which reference will be had in describing the operation of the valve.The ow to the main burner section is illustrated by curve 110 and thatto the simmer section by curve 112.

ln the full main and simmer position of the valve indicated in Figs. 2and 2a, maximum quantities of gas are supplied to both the main andsimmer burners. In this position the inlet passageway 1 is in fullregistry with passageway 11 so that gas is supplied to the axialpassageway 10 and hence through aligned passageways 12 and 2, and 13 and3 to the main and simmer burner sections, respectively. Some gas is alsosupplied through the low simmer outlet passageway 66, but this isnegligible in comparison to that supplied through passageway 3. In thisposition of the valve plug the remaining passageways are closed. Thefull main and simmer position is 198 from the off position as indicatedin both Figs. 2 and 9. The latter shows that maximum flow to both burnersections is obtained 4in this position. As heretofore indicated, thismaximum iiow is determined by the construction or adjustment of hoods 4Sand 56, which are provided with orifices to predetermine the ow, and bythe gas pressure. In the illustrated ow chart, the full main flow isabout 8,000 B. t. u. per hour and the full simmer flow is about 1,400 B.t. u. per hour. These values are illustrative only.

in order to simplify consideration of the operation of the valve, thenext position of the valve to be vconsidered is the full simmer onlyposition illustrated in Figs. 4 and 4a. ln this position a full supplyof gas is supplied to the simmer burner only as determined by the gaspressure and hood 56. The inlet passageway 1 is connected to the axialpassageway 10 in the valve plug by passageway 12, the axial passagewayis connected to the simmer burner outlet passageway 3 by the passageway14 in the valve plug, a negligible flow through the low simmer outletpassageway 60 occurs and the remaining passageways are closed. The fullsimmer only position is at about 90-110 from the oit position. Itsposition can vary because the full simmer ilow obtains over a relativelywide angular range as shown in Fig. 9 and the particular position isdetermined by the positiOn indicating mechanism which may provideindications (such as clicks) at slightly different angular positionsdependent upon the direction of rotation of the valve plug. There is noiiow to the main burner section.

The low simmer position is indicated in Figs. 5 and 5a,

In this position the inlet passageway 1 is in partial registry with thetransverse passageway 12 in the valve plug and the remaining passagewaysare closed. As a result, gas llows to the simmer burner outletpassageway only through the orifice 62 whereby a low predeterminedquantity of gas as determined by the orice and gas pressure is suppliedonly to the simmer burner section. As

shown in Fig. 9, this is a very small flow (such as about` 450 B. t. u.per hour) but a flow adequate to maintain ignition at the simmer burnersection and which can be turned down when the valve plug is moved fromthe low simmer toward the off position. This turndown or regulation iseffected by throttling at the inlet whereas the other turndowns orregulations occur at the outlets from the valve plug.

The nal limit position of the valve is the oil' position illustrated inFigs. 6 4and 6a. At this time the inlet passageway 1 is entirely closedso that no gas ilows to either of the burner sections. It will be notedfrom Fig. that a good seal is provided around the inlet passageway`1.

A turndown range of the simmer only is provided between the full simmerand low simmer positions of Figs. 4 and 5. It will be noted that in thiscase the throttling action or regulation of the supply is elected at theoutlet side of the valve plug because of the fact that the passageways 3and 14, Where the throttling occurs, are considerably smaller than theplug inlet passageway 12 which is effective at this time.

Consideration will now be given to the operation of the valve in theturndown-of-both range between the full on and full simmer positions ofFigs. 2 and 4, an intermediate range of which turndown range isillustrated in Fig. 2b, and the low end of which is illustrated in Figs.l, 3 and 3a. The tlow of gas in this intermediate range as a whole aswell as at the low end thereof is also illustrated in Fig. 9, theturndown range extending between about 144 and to near 180. Inconsidering this operation it will first be assumed that the valve is inits full main and simmer position as illustrated in Figs. 2 and 2a. Inthis position there is a full flow of gas to both burner outletpassageways as previously described.

As the plug is turned from the full main and simmer positions toward theoff position, the ilow of gas to both burner sections is graduallydecreased. As the valve plug is turned, passageways 1, 2 and 3 begin togo out of registry with passageways 11, 12 and 13 to provide slightinitial turndown of ow to both the main and simmer outlet passageways.Slightly later, passageways 5 and 6 begin to register with passageways15 and 16 to interconnect them and thus effectively to connect thesimmer burner outlet passageway to the main burner outlet passageway. Asthe valve plug is turned, the flow of gas to both burner sections issimultaneously reduced as shown graphically in Fig. 9 thereby graduallyto decrease the flow of gas to both burner sections to provide goodfrying. As passageways 5 and 6 register with passageways 1S and 16,passageway 13 goes out of registry with passageway 3. This results inthe supply of gas to both outlet passageways through body passageway 2,as shown best in Fig. 2b, so that the same variable pressure (graduallydecreasing as the valve plug is turned toward oli) is applied to bothpassageways to effect simultaneous decrease in ow of gas through bothoutlet passageways to both burner sections. In this intermediateturndown range, passageway 11 remains in partial registry with the inletpassageway 1 while passageway 12 is in partial registry with bothpassageways 1 and 2. As the valve plug is turned further toward olf, thelow end of the turndown-of-both range is reached, as illustrated inFigs. 3 and 3a. Passageway 12 is out of registry with passageway 2 andthus the low of gas to the interconnected passageways 5 and 6 is throughthe auxiliary valve 66 accompanied by some ow through thel orifice cup62.

As the valve plug is turned still further, passageways 6 and 16 go outof registry and the low fry position of Fig. 3b is reached. In thisposition the simmer burner outlet passageway is supplied solely throughthe oricc cup and the main burner outlet solely through the auxiliaryvalve 66. There can thus be no flare-up of gas flow to the simmer burnersection nor a reduction in tlow thereto below the minimum required tomaintain ignition. The flow through the simmer burner outlet passagewayis yalso such as to maintain ignition of the main burner in the 10W fryrange. Finally, on further turning of thc plug,the full simmer positionis reached.

It should be mentioned that the angular positions of the plug for thevarious valve positions may be varied and that the position indicatingmeans may be constructed accordingly. Also, while the low-end of theturndown-of-both range has been indicated at 144 from ol and the low fryin the range from about 144 to 130, the low fry position may be chosento be at some angular position of the plug providing a somewhat greatergas flow, i. e., the position might well be chosen to be somewhere atthe low end of the turndown-of-both range. Under this type of operation,the range from about 144 to or even to 120, where the ow of gas to themain burner outlet passageway is cut ot entirely, might be considered asort of transition stage from double to single burner operation.

It will be observed therefore from the foregoing detailed description ofthe present invention that there has been provided by this invention anew and improved double valve having a number of operative positionsproviding a particular desirable and advantageous functioning of thevalve providing in particular an advantageous conjoint turndown of thesupply of gas to the main and simmer burner sections. It should beunderstood that while the present invention has been described inconnection with the details of a particular embodiment thereof, thesedetails are not intended to be limitative of the invention exceptinsofar as set forth in the accompanying claims.

While there have been illustrated and described several embodiments ofthe present invention, it will be apparent that various changes andmodifications thereof will occur to those skilled in the art. It isintended in the appended claims to cover all such changes andmodifications as fall within the true spirit and scope of the presentinvention.

What is claimed as new and desired to be secured by Letters Patent ofthe United States is:

l. A double gas valve for a double burner, including in combination, avalve body having main and simmer burner outlet passageways and an inletpassageway, a rotatable valve plug mounted in said body, and meansincluding passageways in said plug and body for selectively connectingsaid inlet passageway to one or both outlet passageways and supplyingfull and regulatable quantities of gas through both outlet passagewaysin a turndown-of-both range and full and regulatable quantities andapredetermined low quantity through only the simmer burner outletpassageway, said means including passageways in the valve body and valveplug connecting saidpsimmer burner outlet passageway to the main burneroutlet passageway and supplying them with gas at the same regulatablepressure for providing the turndown of gas ow through both outletpassageways.

2. A double gas valve for a double burner, including in combination, avalve body having main and simmer burner outlet passageways and an inletpassageway, a rotatable valve plug mounted in said body, and meansincluding passageways in said plug and body for selectively connectingsaid inlet passageway to one or both outlet passageways and supplyingfull and regulatable quantities of gas through both outlet passagewaysin a turndown-of-both range and full and regulatable quantilies and 1predetermined low quantity through only the simmer burner outletpassagevay, said means for supplying regulatable quantities through bothoutlet passageways in the turndown-of-both range including auxiliarymain and simmer burner outlet passageways in the body connected to themain and simmer burner outlet passageways, respectively, passagewaymeans in the valve plug interconnecting said auxiliary passageways insaid range, and other passageway means in the valve plug for supplyinggas at regulatable pressure to said main burner outlet passageway.

3, A double gas valve for a double burner, including in combination, avalve body having `main and simmer burner outlet passageways and aninlet passageway, a rotatable valve plug mounted in said body, and meansincluding passageways in said plug and body for selectively connectingsaid inlet passageway to one or both outlet passageways and supplyingfull and uniformly regulatable quantities of gas through both outletpassageways and full and regulatable quantities and a predetermined lowquantity through only the simmer burner outlet passageway, said meansfor Isupplying said uniformly regulatable quantities through both outletpassageways including auxiliary main and simmer outlet passageways inthe body connected to said outlet passageways, respectively, and otherpassageway means in the valve plug interconnecting said auxiliarypassageways and supplying the same variable pressure to said outletpassageways.

4. A double gas valve for a double burner having main and simmer burnersections, including in combination, a valve body having a plug receivingchamber, main and simmer burner outlet passageways and an inletpassageway opening into said chamber, said main and simmer burner outletpassageways including substantially diametrically opposed portions andthe inlet passageway being substantially intermediate them, a rotatablevalve plug mounted in said chamber, and means including passageways insaid plug and body for selectively connecting said inlet passageway toone or both outlet passage- Ways and Supplying full and uniformlyregulatable quantities of gas through both outlet passageways and fulland regulatable quantities and a predetermined low quantity only throughthe simmer burner outlet passageway, said last mentioned means includingaxial and transverse passageways in the plug of which certain connectthe axial passageway in the plug to the inlet passageway in theoperative positions of the valve and of which certain are aligned withsaid main and simmer outlet passageway portions in a full on position,and of which the aligned simmer burner outlet passageways go out ofregistry before the aligned main passageways as the valve plug is turnedfrom full on toward off, said last mentioned means including alsoauxiliary main and simmer burner passageways in the valve body connectedto said main and simmer outlet passageways and interconnected auxiliarymain and simmer burner outlet passageways in the valve plug whichcommunicate with said auxiliary passageways in the body in a turndownrange in which gas issupplied to the main outlet passageway and from thelatter through said auxiliary outlet passageways to the simmer burneroutlet passageway, whereby uniformly regulatable quantities of gas aresupplied through both outlet passageways with the same pressuremaintained vin both outlet passageways.

5, A double gas valve for a double burner having main and simmer burnersections, including in combination, a valve` body having main and simmerburner outlet passageways and an inlet passageway, said main and simmerburner outlet passageways including substantially diametrically opposedradial portions and the inlet passageway being substantiallyintermediate them, a rotatable valve plug mounted in said body and meansincluding passageways in said plug and body for selegtively Connectingsaid. inlet pas# sageway to one or both outlet passageways and supplyfing full l1nd uniformly regulatable quantities of gas, through bothoutlet passageways and full and regulatable quantities and apredetermined low quantity only through the simmer burner outletpassageway, said last men- 4iioned means including axial and transversepassageways in the plug of which certain connect the axial passageway inthe plug to the inlet passageway in the operative positions of the valveand of which certain are aligned with said radial main and simmer outletpassageway portions in a full on position and of which the alignedsimmer burner outlet passageways go out of registry before the alignedmain passageways as the valve plug is turned from full on toward oil,said last mentioned means including also auxiliary main and lsimmerburner passageways in the valve body and valve plug whichcommunicatewith each other in a turndown range in which gas is supplied to the mainoutlet passageway and from the latter through said auxiliary outletpassageways to the simmer burner outlet passageway whereby regulatablequantities of gas are supplied through both outlet passageways with thesame pressure maintained in both outlet passageways.

6. A double valve as claimed in claim 5 wherein said valve plug includesa further transverse passageway providing communication from the axialpassageway in the plug to said radial portion of the simmer burneroutlet passageway in said `full simmer position.

7. A double gas valve for a double burner, including in combination, aValve body having a plug receiving chamber, main and simmer burneroutlet passageways with radial portions opening into said chamber and aninlet passageway opening into said chamber, a valve plug mounted in saidchamber for rotation between an o i position and a plurality ofoperative positions and having an axial, passageway and. transversepassageways opening into said axial passageway supplying gasY from theinlet to said axial passageway in the operative positions of the valveand of which certain are aligned with said inlet passageway and withsaid main and simmer outlet passageway portions in a full on positionand provide a turndown of gas ow through both said portions as the plugis turned toward an offiposition from said full on position, saidaligned simmer passageways being smaller than the aligned main wherebyturndown of ow to the simmer through said simmer passages occurs at theinitial portion of turndown of flow through said aligned mainpassageways after which said simmer passageways go out of registry Aandflow therethrough is terminated, means including other passageways insaid plug and body communicating with both said main and simmer outletpassageway portions for supplying regulatable quantities of gas throughboth said main and simmer outlet passage-v ways at the same variablepressure as the valve is turned further toward the ofr position to turndown ow through said. aligned main passageways in. the kplus and body,passageway means with a ow restricting orifice therein connecting theaxial passageway in the plug to Isaid main outlet passageway forsupplying a low quantity of gas as determined by said flow restrictingmeans through said main burner outlet passageway, said plug including afurther transverse passageway for supplying a full supply of gas throughonly the simmer burner outlet passageway in a full simmer position andregulatable quantities to that passageway as the valve plug is turnedtoward the on? position from the full simmer position, said plug beingrotatable from said full simmerp osition further toward oit positioninto` a low simmer position in which the said outlet passageway portionsare closed by the plug, and means including a low simmer passageway inthe body having a iiow restricting oriiice connecting the axialpassageway only to said simmer burner outlet passageway for supplying apredeterminable -low quantity of gas through the. simmer burner outletpassageway in the said low simmer position andl also when` said lowquantity l 1 A of` gas is supplied through said flow restricting meansto said main burner outlettpassageway. y

8. A double gas valve for a double burner, including in combination, avalve body having a plug receiving chamber, main and simmer burneroutlet passageways with radial portions opening into said chamber and aninlet passageway opening into said chamber, a valve plug mounted in saidchamber for rotation between an oit position and a plurality ofoperative positions and having an axial passageway and transversepassageways opening into said axial passageway supplying gas from theinlet to said axial passageway in the operative positions of the valveand of which certain are aligned with said inlet passageway and withsaid main and simmer outlet passageway portions in a full on positionand provide a turndown ot gas ow through both said portions as the plugis turned toward an oi position from said full on position, said alignedsimmer passageways being smaller than the aligned main passagewayswhereby turndown of ow through said aligned simmer passages occurs atthe initial portion of turndown of ow through said aligned mainpassageways after which said simmer passageways go out of registry andflow therethrough is terminated, means including auxiliary main andsimmer transverse passageways and a passageway interconnecting them insaid plug and auxiliary main and simmer passageways in said'bodycommunicating with both said main and simmer outlet passageway portionsand said auxiliary plug passageways in a turndown range for supplyingregulatable quantities of gas through both said main and simmer outletpassageways as the valve is turned further toward the off position toturn down flow through said aligned main passageways in the plug andbody, passageway means with a flow restricting orice therein connectingthe axial passageway in the plug to said interconecting passageway forsupplying a low quantity of gas determined by said flow restrictingmeans through said main burner outlet passageways, said plug including afurther transverse passageway for supplying a full suply of gas throughonly the simmer burner outlet passageway in a ullsimmer position andregulatable quantities to that passageway as the valve plug is turnedtoward the off position from the full simmer position, said plug beingrotatable from said full simmer position further toward off positioninto a low simmer position in which the said outlet passageway portionsand further passageways in the body are closed by the plug, and meansincluding a low simmer passageway in the body having a ow re- -strictingorifice connecting the axial passageway only to said simmer burneroutlet passageway for supplying a predeterminable low quantity of gasthrough the simmerv burner outlet passageway in the said low simmerposition and when said low quantity of gas is supplied through said owrestricting means to said main burner outlet passageway.

9. A double gas valve for a double burner, including in combination, avalve body having a plug receiving chamber, main and simmer burneroutlet passageways with radial portions opening into -said chamber andan inlet passageway opening into said chamber, a valve plug mounted insaid chamber for rotation between an oi position and a plurality ofoperative positions and having an axial passageway and transversepassageways opening into said axial passageway supplying gas from theinlet to said axial passageway in the operative positions of the valveand of which certain are aligned with said inlet passageway and withsaid main and simmer outlet passageway portions in a full on positionand provide a turndown of gas ow through both said portions as the plugis turned toward an oi positon from said full on position, said alignedsimmer passageways being smaller than the aligned main passagewayswhereby turndown of ow through said aligned simmer passages occurs atthe initial portion of turndown of ilow through said aligned mainpassageways after which said simmer passageways go out 12 of registryand How therethrough is terminated, means including auxiliary main andsimmer transverse passageways and a passageway interconecting them insaid plug and auxiliary main and simmer passageways in said bodycommunicating with both said main and simmer outlet passageway portionsand said auxiliary plug passageways in a turndown range for supplyingregulatable quantities of gas through both said main and simmer outletpassageways as the valve is turned further toward the off position toturn down flow through said aligned main passageways in the plug andbody, the auxiliary simmer plug passageway going out of registry withits associated auxiliary simmer body passageway before the auxiliarymain passageway in the plug goes out of registry with its associatedauxiliary main body passageway, passageway means with a ow restrictingorifice therein connecting the axial passageway in the plug to saidinterconnecting passageway for supplying a low quantity of gas asdetermined by said ow restricting means to said main burner outletpassageway, said plug including a. further transverse passageway forsupplying a full supply of gas through only the simmer burner outletpassageway in a full simmer position and regulatable quantities to thatpassageway as the valve plug is turned toward the off position from thefull simmer position, said plug being rotatable from said full simmerposition further toward ott position into a low simmer position in whichthe said outlet passageway portions and further passageways in the bodyare closed by the plug, and means including a low simmer passageway inthe body having a flow restricting orifice connecting the axialpassageway only to said simmer burner outlet passageway for supplying apredeterminable low quantity of gas in said low simmer position and alsowhen said low quantity of gas is supplied through said ow restrictingmeans to said main burner outlet passageway.

l0. A double gas valve for a double burner, including in combination, avalve body having main and simmer burner outlet passageways and an inletpassageway, a rotatable valve plug mounted in said body, means includingpassageways in said plug and body for selectively connecting said inletpassageway to one or both outlet passageways and supplying full andregulatable quantities of gas through both outlet passageways in aturndownof-both range and full and regulatable quantities and apredetermined low quantity through only the simmer burner outletpassageway, said means including passageways in the valve body and valveplug interconnecting said main and simmer burner outlet passageways andsupplying them with gas at the same regulatable pressure for providingthe turndown of gas ow through both outlet passageways, and meansincluding flow restricting means in the valve plug for supplying apredetermined low ow of gas through said main outlet passageway in therange between full supply of gas through both outlet passageways andthrough only the simmer outlet passageway.

ll. A double gas valve for a double burner, including in combination, avalve body having main and simmer burner outlet passageways and an inletpassageway, a rotatable valve plug mounted in said body, means includingpassageways in said plug and body for selectively connecting said inletpassageway to one or both outlet passageways and supplying full andregulatable quantities through both outlet passageways in aturndown-of-both range and full and regulatable quantities through onlythe simmer burner outlet passageway, said means ineluding passageways inthe valve body and valve plug interconnecting said main and a simmerburner outlet passageways and supplying them with gas at the sameregulatable pressure for providing the turndown of gas flow through bothoutlet passageways, and means including passageways each having owrestricting means therein between said inlet and associated outletpassageway for 13 supplying each of the outlet passageways with apredetermined low ow of gas.

12. A double gas valve for a double burner, including in combination, avalve body having main and simmer burner outlet passageways and an inletpassageway, a rotatable valve plug mounted in said body, and meansincluding passageways in said plug and body for selectively connectingsaid inlet passageway to one or both outlet passageways for supplyingboth outlet passageways with full and regulatable ow of gas in aturndown range and also supplying a predetermined minimum low flow ofgas through both outlet passageways in another range of movement of theplug and a predetermined minimum low ow of gas through only the simmerburner outlet passageway in a further range of movement of said plug,said last mentioned means including How restricting means individual toeach of said outlet passageways.

References Cited in the le of this patent UNITED STATES PATENTS 651,755Gys June 12, 1900 10 2,095,064 Harper Oct. 5, 1937 2,113,027 Kindl Apr,5, 1938 2,162,231 Schoenberger June 13, 1939 2,284,994 Stuckenholt June2, 1942

